DEERFIELD, Mass. — Officials at a prestigious New England private school say their investigation into a former student's recent allegation of sexual contact in the 1980s by a popular math teacher leaves "no question" that the former teacher engaged in sexual activity with the student.

Deerfield Academy posted its findings on its website Saturday, apologizing to the ex-student and saying the school administration in the 1980s and early 2000s should have been more aggressive in looking into allegations of inappropriate behavior by a teacher.